To change your printer from offline to online, you need to clear the “Use Printer Offline” setting on your computer. On Windows, open **Devices and Printers**, double-click your printer, then in the Printer menu uncheck **Use Printer Offline**. This will switch the printer status from offline to online[1][4][5].

Detailed steps (Windows):

1. Open **Start** and type “Devices and Printers” to open the printer list.
2. Double-click the specific printer showing offline status.
3. In the printer window, click on the **Printer** menu in the menu bar.
4. Uncheck the option **Use Printer Offline**.
5. If there are any pending print jobs, clear them by selecting **See what’s printing**, right-clicking jobs, and choosing **Cancel**.
6. If the printer remains offline, try restarting both your computer and the printer.

For macOS, you generally go to **System Preferences > Printers & Scanners**, select your printer, and ensure it is properly connected and the drivers are installed[2].

Sometimes the offline status results from communication errors such as cable connection issues, paper jams, or outdated drivers[4]. Removing and reinstalling the printer also helps if the problem persists[4].

In summary, **switching off “Use Printer Offline” mode** in your computer’s printer settings is the key action to make the printer go online.